Class: RForce::Binding

Inherits:
Object
  • Object
show all
Includes:
RForce
Defined in:
lib/rforce/binding.rb

Overview

Implements the connection to the Salesforce server.

Constant Summary collapse

DEFAULT_BATCH_SIZE =

Increase the maximum fetch size to 2000, as allowed by Salesforce Added by Raymond Gao

2000
Envelope =

Fill in the guts of this typical SOAP envelope with the session ID and the body of the SOAP request.

<<-HERE
<?xml version="1.0" encoding="utf-8" ?>
<soap:Envelope xmlns:xsd="http://www.w3.org/2001/XMLSchema"
xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:partner="urn:partner.soap.sforce.com"
xmlns:spartner="urn:sobject.partner.soap.sforce.com">
  <soap:Header>
<partner:SessionHeader soap:mustUnderstand='1'>
  <partner:sessionId>%s</partner:sessionId>
</partner:SessionHeader>
%s
  </soap:Header>
  <soap:Body>
%s
  </soap:Body>
</soap:Envelope>
HERE
QueryOptions = 
'<partner:QueryOptions soap:mustUnderstand=\'1\'><partner:batchSize>%d</partner:batchSize></partner:QueryOptions>'
AssignmentRuleHeaderUsingRuleId = 
'<partner:AssignmentRuleHeader soap:mustUnderstand="1"><partner:assignmentRuleId>%s</partner:assignmentRuleId></partner:AssignmentRuleHeader>'
AssignmentRuleHeaderUsingDefaultRule = 
'<partner:AssignmentRuleHeader soap:mustUnderstand="1"><partner:useDefaultRule>true</partner:useDefaultRule></partner:AssignmentRuleHeader>'
MruHeader = 
'<partner:MruHeader soap:mustUnderstand="1"><partner:updateMru>true</partner:updateMru></partner:MruHeader>'
ClientIdHeader = 
'<partner:CallOptions soap:mustUnderstand="1"><partner:client>%s</partner:client></partner:CallOptions>'

Constants included from RForce

SoapResponse, VERSION

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from RForce

#expand

Constructor Details

#initialize(url, sid = nil, oauth = nil, proxy = nil, logger = nil) ⇒ Binding

Create a binding to the server (after which you can call login or login_with_oauth to connect to it). If you pass an oauth hash, it must contain the keys :consumer_key, :consumer_secret, :access_token, :access_secret, and :login_url.

proxy may be a URL of the form user:[email protected]:port

if a logger is specified, it will be used for very verbose SOAP logging



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# File 'lib/rforce/binding.rb', line 56

def initialize(url, sid = nil, oauth = nil, proxy = nil, logger = nil)
  @session_id = sid
  @oauth = oauth
  @proxy = proxy
  @batch_size = DEFAULT_BATCH_SIZE
  @logger = logger
  @url = URI.parse(url)
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method, *args) ⇒ Object

Turns method calls on this object into remote SOAP calls.



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# File 'lib/rforce/binding.rb', line 294

def method_missing(method, *args)
  unless args.empty? || (args.size == 1 && [Hash, Array].include?(args[0].class))
    raise 'Expected at most 1 Hash or Array argument'
  end

  call_remote method, args[0] || []
end

Instance Attribute Details

#assignment_rule_id ⇒ Object

Returns the value of attribute assignment_rule_id.



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# File 'lib/rforce/binding.rb', line 17

def assignment_rule_id
  @assignment_rule_id
end

#batch_size ⇒ Object

Returns the value of attribute batch_size.



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# File 'lib/rforce/binding.rb', line 17

def batch_size
  @batch_size
end

#client_id ⇒ Object

Returns the value of attribute client_id.



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# File 'lib/rforce/binding.rb', line 17

def client_id
  @client_id
end

#trigger_auto_response_email ⇒ Object

Returns the value of attribute trigger_auto_response_email.



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# File 'lib/rforce/binding.rb', line 17

def trigger_auto_response_email
  @trigger_auto_response_email
end

#trigger_other_email ⇒ Object

Returns the value of attribute trigger_other_email.



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# File 'lib/rforce/binding.rb', line 17

def trigger_other_email
  @trigger_other_email
end

#trigger_user_email ⇒ Object

Returns the value of attribute trigger_user_email.



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# File 'lib/rforce/binding.rb', line 17

def trigger_user_email
  @trigger_user_email
end

#update_mru ⇒ Object

Returns the value of attribute update_mru.



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# File 'lib/rforce/binding.rb', line 17

def update_mru
  @update_mru
end

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/rforce/binding.rb', line 17

def url
  @url
end

#use_default_rule ⇒ Object

Returns the value of attribute use_default_rule.



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# File 'lib/rforce/binding.rb', line 17

def use_default_rule
  @use_default_rule
end

Instance Method Details

#call_remote(method, args) ⇒ Object

Call a method on the remote server. Arguments can be a hash or (if order is important) an array of alternating keys and values.



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# File 'lib/rforce/binding.rb', line 138

def call_remote(method, args)
  @server ||= create_server(@url)

  # Different URI requirements for regular vs. OAuth.  This is
  # *screaming* for a refactor.
  fallback_soap_url = @oauth ? @url.to_s : @url.path

  urn, soap_url = block_given? ? yield : ["urn:partner.soap.sforce.com", fallback_soap_url]

  # Create XML text from the arguments.
  expanded = ''
  @builder = Builder::XmlMarkup.new(:target => expanded)
  expand(@builder, {method => args}, urn)

  extra_headers = ""

  # QueryOptions is not valid when making an Apex Webservice SOAP call
  if !block_given?
    extra_headers << (QueryOptions % @batch_size)
  end

  extra_headers << (AssignmentRuleHeaderUsingRuleId % assignment_rule_id) if assignment_rule_id
  extra_headers << AssignmentRuleHeaderUsingDefaultRule if use_default_rule
  extra_headers << MruHeader if update_mru
  extra_headers << (ClientIdHeader % client_id) if client_id

  if trigger_user_email or trigger_other_email or trigger_auto_response_email
    extra_headers << '<partner:EmailHeader soap:mustUnderstand="1">'

    extra_headers << '<partner:triggerUserEmail>true</partner:triggerUserEmail>' if trigger_user_email
    extra_headers << '<partner:triggerOtherEmail>true</partner:triggerOtherEmail>' if trigger_other_email
    extra_headers << '<partner:triggerAutoResponseEmail>true</partner:triggerAutoResponseEmail>' if trigger_auto_response_email

    extra_headers << '</partner:EmailHeader>'
  end

  # Fill in the blanks of the SOAP envelope with our
  # session ID and the expanded XML of our request.
  request = (Envelope % [@session_id, extra_headers, expanded])
  @logger && @logger.info("RForce request: #{request}")

  # reset the batch size for the next request
  @batch_size = DEFAULT_BATCH_SIZE

  # gzip request
  request = encode(request)

  headers = {
    'Connection' => 'Keep-Alive',
    'Content-Type' => 'text/xml',
    'SOAPAction' => '""',
    'User-Agent' => 'activesalesforce rforce/1.0'
  }

  unless show_debug
    headers['Accept-Encoding'] = 'gzip'
    headers['Content-Encoding'] = 'gzip'
  end

  # Send the request to the server and read the response.
  @logger && @logger.info("RForce request to host #{@server} url #{soap_url} headers: #{headers}")
  response = @server.post2(soap_url, request.lstrip, headers)

  # decode if we have encoding
  content = decode(response)

  # Fix charset encoding. Needed because the "content" variable may contain a UTF-8
  # or ISO-8859-1 string, but is carrying the US-ASCII encoding.
  content = fix_encoding(content)

  # Check to see if INVALID_SESSION_ID was raised and try to relogin in
  if method != :login and @session_id and content =~ /sf:INVALID_SESSION_ID/
    if @user
      (@user, @password)
    else
      raise "INVALID_SESSION_ID"
    end

    # repackage and rencode request with the new session id
    request = (Envelope % [@session_id, extra_headers, expanded])
    request = encode(request)

    # Send the request to the server and read the response.
    response = @server.post2(soap_url, request.lstrip, headers)

    content = decode(response)

    # Fix charset encoding. Needed because the "content" variable may contain a UTF-8
    # or ISO-8859-1 string, but is carrying the US-ASCII encoding.
    content = fix_encoding(content)
  end

  @logger && @logger.info("RForce response: #{content}")
  SoapResponse.new(content).parse
end

#create_server(url) ⇒ Object 



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# File 'lib/rforce/binding.rb', line 69

def create_server(url)
  server = Net::HTTP.Proxy(@proxy).new(url.host, url.port)
  server.use_ssl = (url.scheme == 'https')
  server.verify_mode = OpenSSL::SSL::VERIFY_NONE

  # run ruby with -d or env variable SHOWSOAP=true to see SOAP wiredumps.
  server.set_debug_output $stderr if show_debug

  return server
end

#decode(response) ⇒ Object

decode gzip



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# File 'lib/rforce/binding.rb', line 235

def decode(response)
  encoding = response['Content-Encoding']

  # return body if no encoding
  if !encoding then return response.body end

  # decode gzip
  case encoding.strip
  when 'gzip' then
    begin
      gzr = Zlib::GzipReader.new(StringIO.new(response.body))
      decoded = gzr.read
    ensure
      gzr.close
    end
    decoded
  else
    response.body
  end
end

#encode(request) ⇒ Object

encode gzip



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# File 'lib/rforce/binding.rb', line 257

def encode(request)
  return request if show_debug

  begin
    ostream = StringIO.new
    gzw = Zlib::GzipWriter.new(ostream)
    gzw.write(request)
    ostream.string
  ensure
    gzw.close
  end
end

#fix_encoding(string) ⇒ Object

fix invalid US-ASCII strings by applying the correct encoding on ruby 1.9+



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# File 'lib/rforce/binding.rb', line 271

def fix_encoding(string)
  if [:valid_encoding?, :force_encoding].all? { |m| string.respond_to?(m) }
    if !string.valid_encoding?
      # The 2 possible encodings in responses are UTF-8 and ISO-8859-1
      # http://www.salesforce.com/us/developer/docs/api/Content/implementation_considerations.htm#topic-title_international
      #
      ["UTF-8", "ISO-8859-1"].each do |encoding_name|

        s = string.dup.force_encoding(encoding_name)

        if s.valid_encoding?
          return s
        end
      end

      raise "Invalid encoding in SOAP response: not in [US-ASCII, UTF-8, ISO-8859-1]"
    end
  end

  return string
end

#login(user, password) ⇒ Object

Log in to the server with a user name and password, remembering the session ID returned to us by Salesforce.



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# File 'lib/rforce/binding.rb', line 82

def (user, password)
  @user     = user
  @password = password
  @server   = create_server(@url)
  response  = call_remote(:login, [:username, user, :password, password])

  raise "Incorrect user name / password [#{response.Fault}]" unless response.loginResponse

  result      = response[:loginResponse][:result]
  @session_id = result[:sessionId]
  @url        = URI.parse(result[:serverUrl])
  @server     = create_server(@url)

  return response
end

#login_with_oauth ⇒ Object

Log in to the server with OAuth, remembering the session ID returned to us by Salesforce.



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# File 'lib/rforce/binding.rb', line 100

def 
  consumer = OAuth::Consumer.new \
    @oauth[:consumer_key],
    @oauth[:consumer_secret]

  access = OAuth::AccessToken.new \
    consumer, @oauth[:access_token],
    @oauth[:access_secret]

   = @oauth[:login_url]

  result = access.post \
    ,
    '',
    {'content-type' => 'application/x-www-form-urlencoded'}

  case result
  when Net::HTTPSuccess
    doc         = REXML::Document.new result.body
    @session_id = doc.elements['*/sessionId'].text
    @url        = URI.parse(doc.elements['*/serverUrl'].text)
    @server     = access

    class << @server
      alias_method :post2, :post
    end

    return {:sessionId => @session_id, :serverUrl => @url.to_s}
  when Net::HTTPUnauthorized
    raise 'Invalid OAuth tokens'
  else
    raise "Unexpected error: #{response.inspect}"
  end
end

#show_debug ⇒ Object 



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# File 'lib/rforce/binding.rb', line 65

def show_debug
  ENV['SHOWSOAP'] == 'true'
end